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2013 Vol. 39, No. 6

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Revolution of flow structures around model wing of dragonflies in hovering flight
Lai Guojun, Shen Gongxin
2013, (6): 711-716.
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Abstract:
To study the three dimensional flow structures around a single flapping wing of dragonflies in hovering flight for future experimental comparison with flow structures around a fore- or hind wing of dragonflies, an electromechanical flapping mechanism mounted with a model wing was used to simulate th...
New anti-aliasing straight line drawing algorithm based on unweighted area sampling
Mao Xia, Liu Yunlong, Xue Yuli
2013, (6): 717-722.
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Abstract:
Line is a basic element of graphics. Its drawing algorithm is always one of the basic content of computer graphics research. In order to solve the aliasing phenomenon generated when drawing a non-vertical and non-horizontal straight line on a raster graphics monitor, based on Bresenham algorithm and...
Improving the output smoothing of the electric loading system based on the CMAC+PD compound control strategy
Yang Bo, Cheng Long
2013, (6): 723-727.
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Abstract:
Cerebellar model articulation controller and proportional derivative (CMAC+PD) compound control strategy had an unsmooth output, which would increase the vibration of loading motor and decrease the control performance. An improved CMAC+PD compound control strategy with a new weights updating formula...
Design and delay analysis of time-triggered AFDX network
Liu Cheng, Wang Tong, Li Zheng, Xiong Huagang
2013, (6): 728-733.
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Abstract:
Time-triggered mechanism can enhance the determinacy of avionics full duplex switched ethernet(AFDX), and guarantee the temporal determinacy of time-critical message. Time-triggered AFDX (TTAFDX) was proposed, which is the combination of AFDX and time-triggered mechanism. The architecture of TTAFDX ...
Consistency identification method of failure mechanism based on grey theory
Yao Jun, Wang Huan, Su Quan
2013, (6): 734-738,744.
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Abstract:
A study was made on the consistency identification method of failure mechanism. Three common methods based on the acceleration model parameters unchanged, based on the statistical methods and based on the experimental observation were studied. It was found that the three methods need the accelerated...
SINS/CNS integrated navigation algorithms based on dual quaternion
Qian Huaming, Sun Long, Huang Wei, Liu Xuan
2013, (6): 739-744.
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Abstract:
In order to improve the navigation precision of strapdown inertial navigation systems/celestial navigation systems (SINS/CNS) integrated navigation system in high dynamic conditions, a SINS/CNS integrated navigation algorithm which based on the additive dual quaternion was proposed. The rotation and...
Radar scattering characteristics and RCS reduction of utility helicopter
Bao Xiaoxiang, Zhang Yunfei, Du Xiaosong
2013, (6): 745-750.
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Abstract:
The physical optics (PO) and the method of equivalent currents (MEC) were used as the numerical computation method, and its feasibility was verified by experiment. A geometric model of conventional utility helicopter was established. Then its radar cross section(RCS)was calculated and analyzed. RCS ...
Optimal method of transport aircraft fleet cargo loading
Liu Ningjun, Wang Lixin, Pan Wenjun
2013, (6): 751-755.
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Abstract:
An algorithm that can automatically generate cargo loading plans for the transport aircraft fleet would greatly increase the efficiency of airlift operations. A new method of loading transport aircrafts was proposed by combining traditional 2D bin-packing algorithms with "pyramid loading" commonly u...
Method to realize path integration based on multi-scale grid cells
Tai Nengjian, Wu Dewei, Qi Junyi, Zhou Yang
2013, (6): 756-760.
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Abstract:
In order to autonomously reckon location and azimuth for unmanned combat aerial vehicle (UCAV)’s cognitive navigation, a kind of path integration based on multi-scale grid cells was proposed. According to the characteristics of neighboring cells in dorsal medial entorhinal cortex (dMEC) sharing comm...
Ergonomic design and analysis of character coding on display interface
Zhou Yingwei, Zhuang Damin, Wu Xu, Wanyan Xiaoru
2013, (6): 761-765.
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Abstract:
Aiming at the problems of character design on the human-machine interface, lots of static simulation experiments were taken based on a closed simulated cockpit. 32 subjects were participated in the experiments. Reaction time and correct rate were used as ergonomic evaluation indexes. The identificat...
Simulation model validation based on OMLHD method
Dong Dezhi, Wang Jiangyun, Zhang Ping
2013, (6): 766-770.
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Abstract:
When simulation factors are numerous while real-world observed data are sparse, the issue of validating the simulation models is problematic. An extreme case was focused that limited real-world observations were available cross the factor space, and only a single replicate was obtained on per simula...
Unbalanced magnetic pull due to the magnetizing in super high speed permanent magnet synchronous machine
Li Yanming, Guo Hong, Xie Qingming, Qian Hao
2013, (6): 771-775.
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Abstract:
The unbalanced magnetic pull (UMP) due to the magnetizing angle deviation has a great impact on the safety and stability of the super high speed permanent magnet synchronous machine (PMSM) used in the microturbine generation system. Utilizing the numerical finite element method (FEM), the UMP due to...
Investigation of runback ice during aircraft anti-icing process
Wang Chao, Chang Shinan, Yang Bo, Li Mingzhong
2013, (6): 776-781.
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Abstract:
The calculation was performed on runback ice and its effects on the aerodynamic characteristics of the airfoil. A multi-step ice accretion code was developed based on the classical Messinger icing model and it was used to predict the ice shapes in different conditions. Good agreement between the cal...
Reader anti-collision algorithm based on random slot for RFID systems
Zhang Guangshan, Zhang Shuo, Zhang Youguang
2013, (6): 782-786.
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Abstract:
A reader anti-collision algorithm based on random slot with a central computer coordination for radio frequency identification(RFID) systems was proposed. Firstly, the central computer sent the initial command and solt command, and the reader selected random slot based on utilization. If the reader ...
Identification method of failure mechanism consistency for accelerated testing based on grey forecasting
Pan Xiaoxi, Kang Rui
2013, (6): 787-791,797.
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Abstract:
Consistency of failure mechanism identification is one of the preconditions of correctness of accelerated testing design. The existing identification methods of failure mechanism consistency are based on data from accelerated testing which can not guide the design of accelerated testing. Therefore, ...
Path planning of a climbing robot using mixed integer linear programming
Yue Ronggang, Wang Shaoping
2013, (6): 792-797.
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Abstract:
To study path planning problem in 3D building environments for a climbing robot which is named as City-Climber, a path planning method using mixed integer linear programming (MILP) was developed. In order to use MILP to solve obstacle avoidance problems, the robot dynamic model was simplified and de...
Dynamic response analysis of water dropping for firefighting aircraft
Luo Linyin, Lü Jihang
2013, (6): 798-802.
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Abstract:
A mass of water dropping for a time of large firefighting aircraft can produce dynamic response problem in flight. The variational process of water quality was deduced by applying hydromechanical simulation of fenestral outflow.Considering rigid-body modes and elastic modes, dynamic response analysi...
Multi-parameter and multi-objective optimization method for air powered engine
Xu Qiyue, Cai Maolin, Yu Qihui, Fu Xiangheng
2013, (6): 803-807.
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Abstract:
Designing of air powered engine concerns the impact on performance optimization by multi-parameter coupling, and it is complicated to establish the comprehensive evaluation function for multiple performance indicators such as ideal power and efficiency. Therefore the orthogonal design was carried ou...
Knowledge-driven rapid design on aircraft wing structure
Tang Jiapeng, Xi Ping, Hu Bifu, Xu Jinfeng
2013, (6): 808-812.
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Abstract:
In order to improve the quality and efficiency of aircraft wing structure in the preliminary design stage, modeling process of aircraft wing structure was studied. The coordinate of the structure layout and component location parameters rules were defined. Rapid modeling method of wing structure bas...
Multi-indexes robust fault detection of aircraft networked control systems
Niu Erzhuo, Wang Qing, Wang Mingming, Dong Chaoyang
2013, (6): 813-817.
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Abstract:
The problem of multi-indexes robust fault detection was investigated for aircraft networked control systems with short Markov delays and partially known transition probabilities. The conventional fault detection method for Markovian jump systems sees fault, input and disturbance as a generalized inp...
Cross calibration of CCD cameras in HJ satellite based on the image simulation
Gong Hui, Tian Guoliang, Yu Tao, Gu Xingfa
2013, (6): 818-822.
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Abstract:
As to two CCD cameras in the same HJ-1 satellite, a new cross calibration method was proposed based on image simulation. Through the method, un-calibrated CCD without obtaining the image of a target was cross-calibrated by calibrated CCD covering the target by analyzing the mathematical relation of ...
Accelerated model for network reliability for M/M/1 model
Li Ruiying, Kang Rui, Huang Ning
2013, (6): 823-828.
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Abstract:
Testing is a very important way to identify network reliability. However, the mission cycle of networks is usually long. In order to expose network transmission delay failure effectively, reliability testing time is often several times of its mission cycle, otherwise it will bring the problem of bot...
Automatic dimensioning for 3D model of shaft-like parts
Wang Bo, Zheng Guolei, Duan Lihua
2013, (6): 829-834.
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Abstract:
An automatic dimensioning algorithm was presented in order to solve the problem that automatic dimensioning could not reflect the design intent, which was due to the exclusive consideration on the geometry of the products, as well as the ignorance of the functional properties. Firstly, the dimension...
Application of low speed opto-electronic tracking systems based on sliding mode distutbance observer
Ren Yan, Liu Zhenghua, Zhou Rui
2013, (6): 835-840.
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Abstract:
Based on the influence of nonlinear factors on the low-speed performance of opto-electronic tracking servo systems, the system design was divided into two parts. All disturbance was equivalent to an equivalent input disturbance (EID) existed on the control input channel. A sliding mode disturbance o...
Energy-efficient uplink training for downlink multi-antenna transmission
Liu Xin, Han Shengqian, Xu Zhikun, Yang Chenyang
2013, (6): 841-846.
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Abstract:
The design of uplink training aimed at maximizing the energy efficiency (EE) for time division duplex (TDD) multi-antenna systems was investigated. It was proved that when the channel estimation errors are taken into account, both the upper bounds of EE and spectrum efficiency (SE) are concave funct...
Wavelet multi resolutionweight correlationimage fusion method
Yuan Xiaodong, Li Chao, Sheng Hao
2013, (6): 847-852.
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Abstract:
An image fusion method which based on wavelet multi resolution of weight correlation was introduced for the fusion of multispectral image and panchromatic image. On basis of wavelet decomposition for original image, the method fused the high and low weights image with different fusing rules, and the...

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